Employing Chimeric Xylanases to Identify Regions of an Alkaline Xylanase Participating in Fnzyme Activity at Basic pH(ENZYMOLOGY, PROTEIN ENGINEERING, AND ENZYME TECHNOLOGY)
スポンサーリンク
概要
- 論文の詳細を見る
The xylanase A (XynA) from the alkaliphilic Bacillus halodurans C-125 and the xylanase B (XynB) from Clostridium stercorarium F9 were subdivided into four fragments at highly homologous regions present in their primary structures: an amino-terminal region (A or a), a region containing the putative proton donor (P or p), a region containing the putative catalytic nucleophile (N or n), and a carboxyl-terminal region (C or c). Six chimeric xylanases were constructed by the selective substitution of the four fragments using an overlapping PCR technique. Two of the six xylanases, APnc and Apnc (regions originating from XynA are denoted by upper case letters and those from XynB are denoted by lower case letters), were produced in Escherichia coli while the other four xylanases were obtained only as inclusion bodies. The APnc and Apnc chimeric enzymes were purified by column chromatography using Ni-NTA agarose and DEAE-Toyopearl. The respective pH and temperature stabilities of the purified enzymes were observed from pH 5.6 to 11.6 and up to 45℃ for APnc, and from pH 5.6 to 11.2 and up to 45℃ for Apnc. Thus, these enzymes were slightly less stable than the parental xylanases. An assessment of the pH-activity relationships for the chimeric xylanases employed p-nitrophenyl-β-D-xylobioside as the substrate in determinations of the k_cat values. The pK_a1, values for the APnc and Apnc chimeric enzymes were 4.3 and 4.2, respectively, which were almost identical to those for the parental xylanases. In contrast, the pK_a2 values obtained for APnc and Apnc were 9.1 and 8.5, respectively; these values fall between those for the parental xylanases, XynA (9.4) and XynB (7.8). These results indicate that the main regions necessary to maintain the high pK_a2 value of XynA locate in the A and P sections.
- 社団法人日本生物工学会の論文
- 2002-11-25
著者
-
Kitaoka Motomitsu
National Food Research Institute, National Agriculture and Food Research Organization
-
KITAOKA Motomitsu
Enzyme Laboratory, National Food Research Institute, National Agriculture and Food Research Organiza
-
Kitaoka M
Enzyme Laboratory National Food Research Institute
-
Kitaoka M
Chubu Univ. Aichi Jpn
-
Kitaoka Motomitsu
Enzyme Laboratory National Food Research Institute National Agriculture And Food Research Organizati
-
Hayashi K
Enzyme Laboratory National Food Research Institute
-
HAYASHI Kiyoshi
Enzyme Applications Laboratory, National Food Research Institute
-
Kitaoka Motomitsu
Enzyme Laboratory National Food Research Institute
-
Nishimoto Mamoru
Enzyme Laboratory National Food Research Institute
-
Nishimoto Mamoru
Enzyme Laboratory National Food Research Institute National Agriculture And Food Research Organizati
関連論文
- Practical Preparation of D-Galactosyl-β1→4-L-rhamnose Employing the Combined Action of Phosphorylases
- Analyses of Bifidobacterial Glycosidases Involved in the Metabolism of Oligosaccharides
- The Role of Conserved Arginine Residue in Loop 4 of Glycoside Hydrolase Family 10 Xylanases
- Crystallographic and Mutational Analyses of Substrate Recognition of Endo-α-N-acetylgalactosaminidase from Bifidobacterium longum
- グライコシンターゼ化による反転型加水分解酵素のグリコシド合成触媒への変換
- Kinetic Studies on p-Nitrophenyl-cellobioside Hydrolyzing Xylanase from Cellvibrio gilvus
- Phosphorolytic Reaction of Cellvibrio gilvus Cellobiose Phosphorylase
- Purification and Properties of a Xylanase from Cellvibrio gilvus That Hydrolyzes p-Nitrophenyl Cellooligosaccharides(Biological Chemistry)
- Synthesis of Laminarioligosaccharides Using Crude Extract of Euglena gracilis z Cells(Biological Chemistry)
- A Simple Method of Cellulase Immobilization on a Modified Silica Support
- Purification and Characterization of Extracellular Chitin Deacetylase from Colletotrichum lindemuthianum
- 647 A putative proline iminopeptidase of Thermotoga maritime with leucine- and lysine-p-nitroanilide hydrolyzing activities
- Practical Preparation of Lacto-N-biose I, a Candidate for the Bifidus Factor in Human Milk
- Characterization of a Cellobiose Phosphorylase from a Hyperthermophilic Eubacterium, Thermotoga maritima MSB8(Biochemistry & Molecular Biology)
- Kinetic Studies of a Recombinant Cellobiose Phosphorylase (CBP) of the Clostridium thermocellum YM4 Strain Expressed in Escherichia coli
- Effects of Truncation at the Non-homologous Region of a Family 3 β-Glucosidase from Agrobacterium tumefaciens
- Identification of the Putative Proton Donor Residue of Lacto-N-biose Phosphorylase (EC 2.4.1.211)
- A Thermostable Non-xylanolytic α-Glucuronidase of Thermotoga maritima MSB8(Biochemistry & Molecular Biology)
- Syntheses of 4-Methylumbelliferyl-β-D-Xylobioside and 5-Bromo-3-Indolyl-β-D-Xylobioside for Sensitive Detection of Xylanase Activity on Agar Plates
- Diversity and Similarity of Microbial Communities in Petroleum Crude Oils Produced in Asia
- Characterization of Bacillus halodurans α-Galactosidase Mel4A Encoded by the mel4A Gene (BH2228)
- Characterization of a Thermostable Family 10 Endo-Xylanase (XynB) from Thermotoga maritima That Cleaves p-Nitrophenyl-β-D-Xlyloside
- Analyses of Bifidobacterial Glycosidases Involved in the Metabolism of Oligosaccharides
- 糖質加リン酸分解酵素
- Kinetic Studies on the Hydrolysis of N-Acetylated and N-Deacetylated Derivatives of 4-Methylumbelliferyl Chitobioside by the Family 18 Chitinases ChiA and ChiB from Serratia Marcescens
- Substrate Specificity of the N, 6-ο-Diacetylmuramidase from Streptomyces globisporus
- An Investigation of the pH-Activity Relationships of Cex, a Family 10 Xylanase from Cellulomonas fimi : Xylan Inhibition and the Influence of Nitro-Substituted Aryl-β-D-Xylobiosides on Xylanase Activity
- グライコシンターゼ化による反転型加水分解酵素のグリコシド合成触媒への変換
- Prebiotic Effect of Lacto-N-biose I on Bifidobacterial Growth
- Characterization of Bacillus halodurans α-Galactosidase Me14A Encoded by the mel4A Gene (BH2228)
- Practical Preparation of D-Galactosyl-β1→4-L-rhamnose Employing the Combined Action of Phosphorylases
- Molecular Anatomy of the Alkaliphilic Xylanase from Bacillus halodurans C-125
- Employing Chimeric Xylanases to Identify Regions of an Alkaline Xylanase Participating in Fnzyme Activity at Basic pH(ENZYMOLOGY, PROTEIN ENGINEERING, AND ENZYME TECHNOLOGY)
- Structural Explanation for the Acquisition of Glycosynthase Activity
- A Kinetic Study on pH-Activity Relationship of XynA from Alkaliphilic Bacillus halodurans C-125 Using Aryl-Xylobiosides
- Characterization of N-Acetylmuramidase M-1 of Streptomyces globisporus Produced by Escherichia coli BL21(DE3)pLysS
- Characterization of Glycosynthase Mutants Derived from Glycoside Hydrolase Family 10 Xylanases
- Mutational Analysis of Fungal Family 11 Xylanases on pH Optimum Determination
- Interactions between Glycoside Hydrolase Family 94 Cellobiose Phosphorylase and Glucosidase Inhibitors
- p-Nitrophenyl β-Glycosides of β-1,4-Gluco/xylo-disaccharides for the Characterization of Subsites in Endo-xylanases
- Self-transferring Product Inhibition Observed during the Hydrolysis of Aryl-β-D-Glucopyranosides by a β-Glucosidase from Agrobacterium tumefaciens
- Characterization of a Bacterial Laminaribiose Phosphorylase